the SLP 85MM is different from the LS6/Z06 MAFs... SLP uses a resistor to change the output of the MAF so you don't have to adjust your MAF tables in the PCM (still isn't 100% accurate however)

If the connector is the same id imagine it'd work (don't quote me on that though) ... but I bet you'll still need to adjust the MAF table in the PCM.... so Most likely the LS2 MAF will require your computer to be reprogrammed (same if you go to an OEM LS6/Z06 MAF)

Also keep in mind while your MAF is 85mm your TB and Intake manifold are smaller than that (78mm I think?) so doesn't do a whole lot of good to allow more air in up front and then restrict it immediately after.... (unless you have a FAST 90/90 or an LS2 Intake manifold w/the appropriate TB .. then your MAF becomes the restriction)